1012921893 has 12 divisors (see below), whose sum is σ = 1463544108. Its totient is φ = 675080640.

The previous prime is 1012921891. The next prime is 1012921907. The reversal of 1012921893 is 3981292101.

It can be written as a sum of positive squares in 2 ways, for example, as 446815044 + 566106849 = 21138^2 + 23793^2 .

It is not a de Polignac number, because 1012921893 - 2¹ = 1012921891 is a prime.

It is a super-2 number, since 2×1012921893² = 2052021522637406898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012921891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19353 + ... + 48993.

It is an arithmetic number, because the mean of its divisors is an integer number (121962009).

Almost surely, 2^1012921893 is an apocalyptic number.

It is an amenable number.

1012921893 is a deficient number, since it is larger than the sum of its proper divisors (450622215).

1012921893 is a wasteful number, since it uses less digits than its factorization.

1012921893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33444 (or 33441 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1012921893 is about 31826.4338718619. The cubic root of 1012921893 is about 1004.2888769044.

The spelling of 1012921893 in words is "one billion, twelve million, nine hundred twenty-one thousand, eight hundred ninety-three".